What happens during an orgasm?

Semen is made up of sperm produced in the testicles, as well as fluid from the prostate gland and seminal vesicles (two glands behind a man’s bladder). When a man has an orgasm, he usually ejaculates at the same time. The semen produced is squirted out of the penis (ejaculation).

The male orgasm lasts from just before the semen first spurts out until the last semen is ejaculated.

Can I increase how much semen I produce?

If there’s no obvious cause for the reduced amount of semen, you may be able to increase it by:

stopping smoking – men who smoke have lower quality sperm than non-smokers